From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../patches-4.1/312-ixp4xx_pata_optimization.patch | 137 +++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 target/linux/ixp4xx/patches-4.1/312-ixp4xx_pata_optimization.patch

(limited to 'target/linux/ixp4xx/patches-4.1/312-ixp4xx_pata_optimization.patch')

diff --git a/target/linux/ixp4xx/patches-4.1/312-ixp4xx_pata_optimization.patch b/target/linux/ixp4xx/patches-4.1/312-ixp4xx_pata_optimization.patch
new file mode 100644
index 0000000..59c2837
--- /dev/null
+++ b/target/linux/ixp4xx/patches-4.1/312-ixp4xx_pata_optimization.patch
@@ -0,0 +1,137 @@
+--- a/drivers/ata/pata_ixp4xx_cf.c
++++ b/drivers/ata/pata_ixp4xx_cf.c
+@@ -24,16 +24,58 @@
+ #include <scsi/scsi_host.h>
+ 
+ #define DRV_NAME	"pata_ixp4xx_cf"
+-#define DRV_VERSION	"0.2"
++#define DRV_VERSION	"0.3"
+ 
+ static int ixp4xx_set_mode(struct ata_link *link, struct ata_device **error)
+ {
++	struct ixp4xx_pata_data *data = link->ap->host->dev->platform_data;
++	unsigned int pio_mask;
+ 	struct ata_device *dev;
+ 
+ 	ata_for_each_dev(dev, link, ENABLED) {
+-		ata_dev_info(dev, "configured for PIO0\n");
+-		dev->pio_mode = XFER_PIO_0;
+-		dev->xfer_mode = XFER_PIO_0;
++		if (dev->id[ATA_ID_FIELD_VALID] & (1 << 1)) {
++			pio_mask = dev->id[ATA_ID_PIO_MODES] & 0x03;
++			if (pio_mask & (1 << 1)) {
++				pio_mask = 4;
++			} else {
++				pio_mask = 3;
++			}
++		} else {
++			pio_mask = (dev->id[ATA_ID_OLD_PIO_MODES] >> 8);
++		}
++
++		switch (pio_mask){
++			case 0:
++				ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
++				dev->pio_mode = XFER_PIO_0;
++				dev->xfer_mode = XFER_PIO_0;
++				*data->cs0_cfg = 0x8a473c03;
++				break;
++			case 1:
++				ata_dev_printk(dev, KERN_INFO, "configured for PIO1\n");
++				dev->pio_mode = XFER_PIO_1;
++				dev->xfer_mode = XFER_PIO_1;
++				*data->cs0_cfg = 0x86433c03;
++				break;
++			case 2:
++				ata_dev_printk(dev, KERN_INFO, "configured for PIO2\n");
++				dev->pio_mode = XFER_PIO_2;
++				dev->xfer_mode = XFER_PIO_2;
++				*data->cs0_cfg = 0x82413c03;
++				break;
++			case 3:
++				ata_dev_printk(dev, KERN_INFO, "configured for PIO3\n");
++				dev->pio_mode = XFER_PIO_3;
++				dev->xfer_mode = XFER_PIO_3;
++				*data->cs0_cfg = 0x80823c03;
++				break;
++			case 4:
++				ata_dev_printk(dev, KERN_INFO, "configured for PIO4\n");
++				dev->pio_mode = XFER_PIO_4;
++				dev->xfer_mode = XFER_PIO_4;
++				*data->cs0_cfg = 0x80403c03;
++				break;
++		}
+ 		dev->xfer_shift = ATA_SHIFT_PIO;
+ 		dev->flags |= ATA_DFLAG_PIO;
+ 	}
+@@ -46,6 +88,7 @@ static unsigned int ixp4xx_mmio_data_xfe
+ 	unsigned int i;
+ 	unsigned int words = buflen >> 1;
+ 	u16 *buf16 = (u16 *) buf;
++	unsigned int pio_mask;
+ 	struct ata_port *ap = dev->link->ap;
+ 	void __iomem *mmio = ap->ioaddr.data_addr;
+ 	struct ixp4xx_pata_data *data = dev_get_platdata(ap->host->dev);
+@@ -53,8 +96,34 @@ static unsigned int ixp4xx_mmio_data_xfe
+ 	/* set the expansion bus in 16bit mode and restore
+ 	 * 8 bit mode after the transaction.
+ 	 */
+-	*data->cs0_cfg &= ~(0x01);
+-	udelay(100);
++	if (dev->id[ATA_ID_FIELD_VALID] & (1 << 1)){
++		pio_mask = dev->id[ATA_ID_PIO_MODES] & 0x03;
++		if (pio_mask & (1 << 1)){
++			pio_mask = 4;
++		}else{
++			pio_mask = 3;
++		}
++	}else{
++		pio_mask = (dev->id[ATA_ID_OLD_PIO_MODES] >> 8);
++	}
++	switch (pio_mask){
++		case 0:
++			*data->cs0_cfg = 0xa9643c42;
++		break;
++		case 1:
++			*data->cs0_cfg = 0x85033c42;
++		break;
++		case 2:
++			*data->cs0_cfg = 0x80b23c42;
++		break;
++		case 3:
++			*data->cs0_cfg = 0x80823c42;
++		break;
++		case 4:
++			*data->cs0_cfg = 0x80403c42;
++		break;
++	}
++	udelay(5);
+ 
+ 	/* Transfer multiple of 2 bytes */
+ 	if (rw == READ)
+@@ -79,8 +148,24 @@ static unsigned int ixp4xx_mmio_data_xfe
+ 		words++;
+ 	}
+ 
+-	udelay(100);
+-	*data->cs0_cfg |= 0x01;
++	udelay(5);
++	switch (pio_mask){
++		case 0:
++			*data->cs0_cfg = 0x8a473c03;
++		break;
++		case 1:
++			*data->cs0_cfg = 0x86433c03;
++		break;
++		case 2:
++			*data->cs0_cfg = 0x82413c03;
++		break;
++		case 3:
++			*data->cs0_cfg = 0x80823c03;
++		break;
++		case 4:
++			*data->cs0_cfg = 0x80403c03;
++		break;
++	}
+ 
+ 	return words << 1;
+ }
-- 
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